Delete more dead files resurrected by cvs2git.

scripts/mc.sh:
scripts/mcn.sh:
scripts/mcs.sh:
scripts/mercury_update_interface.sh:
scripts/mgnuc.sh:
scripts/mint.sh:
scripts/mnc.sh:
scripts/mnl.sh:
scripts/mnp.sh:
scripts/mod2init.in:
scripts/mod2init.sh:
scripts/msc.sh:
scripts/msl.sh:
scripts/msp.sh:
scripts/sicstus_conv.sh:
     As above.